Pulley



UNITED, STATES PATENT OFFICE.

THOMAS CORSCADEN, OFNEIV BRITAIN, CONNECTICUT, ASSIGNOR TO THE AMERICAN PULLEY COMPANY, OF PHILADELPHIA, PENNSYLVANIA.

PU LLEY.

SPECIFICATION forming part of Letters Patent No. 575,106, dated January 12, 1897. Appnmion fil d November 24,1894. Serial No. 529,850. (Emma) To all whom it may concern: at the middle portion of the rim and for its Be it known that I, THOMAS CORSCADEN, a entire circumference, which will always percitizen of the United States, residing at New mit theair under the belt to escape, as the Britain, in the county of Hartford and State belt never wholly encircles the pulley. The 5 5 of Connecticut, have invented certain new flanges form astrengthening-ribimmediately and useful Improvementsin Pulleys, of which inside the groove, so that forming the groove the following is a specification. at this point does not in any way weaken the My invention relates to improvements in pulley-rim. I prefer to divide the half-rims pulleys; and the objects of my improvements by one edge of one spoke on one 'side and by 10 are simplicity and economy in construction the opposite edge of another spoke on the and general efficiency of the pulley. opposite side. For example, I divide the rim In the accompanying drawings, Figure 1 is on a line with the upper edge of the spoke B a side elevation of my pulley with a small on' the right-hand side of Fig. 1 and on a line portion of the hub in section. Fig. 2 is a with the lower edge of the spoke C 011 the '65 I5 sectional view of one-half of mypulley on left-hand side of Fig. 1, but the seam orjoint the line 00 x of Fig. 1, looking to the right. between the two half-rims may, if desired,be Fig. 3 is an enlarged sectional view of a porat a point about midway between two spokes. tion of said wheel on the line 'y y of Fig. 1, The two flanges 12 in the completed rim or looking downwardly. Fig. 4 is a plan view half-rim form a central inwardly-projecting 20 of the blank for one of the bolt-lugs forthe strengthening-rib, which also serves as arim. Fig. 5 is a plan view of a portion of my spoke-attaching rib and means for connectwheel-hub and two bolt-lu gs for said hub with ing the rim bolt-lugs a bolt in the right-hand bolt-lug. Fig. 6 is a The hub-shells 14 are formed into semicyplan View of the blank from which the hub lindrical form from blanks like Fig. 8, in z 5 bolt-lugs are made. Fig. 7 is a plan view of a which the width from side to side represents blank from which the spoke-arms and their the length of the hub. The spoke-arms 15 connecting-webs are formed. Fig. Sis a plan and their semicylindrical connecting-webs 16 view from which the hub-shells are formed. are formed from the blank, Fig. 7, by rolling I My present invention is mainly in the nathe flat connecting-web 16, Fig. 7, into the 3o ture of an improvement upon the pulley of semicylindrical form of Figs. 1, 2, and 5; my prior patents, Nos. 474,546 and 474,547, while the spoke-arms are bent at an angle dated May 10, 1892, although some features thereto, so as to radiate from said web, as in thereof are applicable to an undivided pulley. my former patent, No. 474,547. The differ- In the preferred form I make the rim or ence in the vertical width of the blanks, Figs. 5 half-rimA of two strips of metal with a flange 7 and S, is such as to be equalized when said 12 at one edge and a bead or roll 13 at the blanks are formed up and the hub-shells opposite edge, while said strips are curved to placed in side of the connecting-webs,as shown conform to the desired circumference of the in Figs. 1 and 2. This forming up will also pulley. These two strips are placed side by make the lug mortises or holes in said blanks o 40 side, with their flanges l2 abutting against register with each other when formed. As a each other, so that the rolls 13 come on opposort of preliminary fastening for convenience site edges of the completed rim or half-rim. in assembling I first secure each connecting- Although the strips are curved slightly, as web 16 in'position on the hub-shells 14 by shown, they have on their outer side a somemeans ofa rivet, as at 17, Figs. 1 and 2. The 5 5 what-flattened face, that is to say, a face spoke-arms, if desired, may be strengthened which is specially adapted to a flat belt in by any suitable beads or corrugations. The contradistinction to a grooved face for a cord spoke-arms are of the proper length to abut or round belt. I also leave the outer corners against the inner surface of the pulley-rim, of each piece at the junction with the abutand their outer ends are secured to the cen- I00 50 ting flanges 12 slightly rounded, as shown, tral rib by rivets or screws, as at 18, on the whereby a circumferential groove is formed spoke-arms in Fig. 1.

I form the hub bolt-lugs 19 from blanks like Fig. 6 by bending the same along the vertical middle portion into a U- shape,while the narrow slit ends 20 are bent around and meet, thus forming a short tubular portion 21 at the outer end of each lug, but said tubular portion may be omitted and the bolt-head or nut, or a washer under it, rest directly 011 the U shaped end of said lug. The curved edges 22 of said blank in the formed-up hub boltlugs fit the periphery of the connecting-webs 16, as shown in Fig. '1, while the wings 23 serve as lugs or tenons,which, passing through the holes in the connecting-web and into the holes in the hub-shells inside said web, as shown at the portion sectioned in Fig. 1, may be riveted or headed down to firmly secure said hub bolt-lugs in place and at the same time fasten together said hub-shells and connecting-webs. Bolts 24: are passed through the hub bolt-lugs, as in other two-part pulleys.

The rim bolt-lugs 28 are formed from blanks like that shown in Fig. i, the same being bent along its middle vertical line into a partial tubular form, with the broad sides of its ends lying parallel and open sufficiently to receive the two flanges 12, that form the central inner rib of the pulley-rim, as best shown in Fig. 3, when it is secured to said rib by rivets 180. The wings 25 are merely to make room for more rivets than could be used if said wings were omitted.

In the spoke-arms, adjacent to the rim boltlugs, I form transverse swells or bolt-sockets 26, Fig. 1, the space between which substantially coincides with the hole through the said lugs, so that the rim-bolts 27, passing through said lugs and between the adjacent spokearms, serve to firmly secure the abutting ends of the two half-rims together. In case, however, the dividii'lg-line of the half-rims should be in the middle of the space between two spokes, as hereinbefore suggested, then it is only necessary to put a rim bolt-lu g like the lug 28 at each end of each half-rim. The rivets by which the rim and spoke-arms are secured together and the rivets that secure the rim bolt-lu gs serve also to fasten together the two parts of each rim or half-rim, but, if desired, additional rivets may be inserted through the two flanges 12.

\Vhile I have described the best construction known to me of the several parts, I wish it distinctly understood that I do not limit myself to the particular details of construction thus described, but I intend to claim all such variations as mechanical skill and j uc gment may suggest, as well as all changes that come fairly within the spirit and scope of my invention, and it is evident that any desired change may be made in any of the parts, provided the same does not also materially change the particular features relied 011 for novelty in any one claim.

I claim as my invention- 1. A pulley having a circuinferentially-divided rim with flattened face for a flat belt, the parts of which rim meet in an inwardlyprojecting flange in the inside of said rim and in a circumferential groove on the outer side of said rim, a hub and a series of separate spoke'arms radiating from said hub and having their outer ends lapped upon and secured to the said inwardly-projeeting flange of the two-part rim substantially as described and for the purpose specified.

2. A divided pulley, having at one end of each half of the rim a spoke with a transverse bolt-socket 26, and at the other end of each half-rim the rim-bolt lug 28, which registers with said bolt-socket, substantially as described and for the purpose specified.

A divided pulley the hub of which is provided with bolt-1n gs,the main body of said lugs being U shape in cross-section while the outer end of each lug is provided with a short tu bular portion 21, substantially as described and for the purpose specified.

4. A pulley having a transversely-divided and internally-flanged rim, and rim-bolt lugs with the sockets of said lugs inside of said rim and with portions of each lug embracing opposite sides of the central rib or flange to which said rim-bolt lugs are secured, substantially as described and for the purpose specified.

5. In a sheet-metal pulley, a circumferentially-divided internally-flanged rim, in combination with spokes whose hub-terminals 16 encircle hub-shells 14 and are secured thereto substantially as described.

THOS. CORSCADEN.

\Vitnesses:

JAMES SHEPARD, A. W. STIPEK. 

